How to use the gunicorn.util.write function in gunicorn

if self.response_length is not None:
            if self.sent >= self.response_length:
                # Never write more than self.response_length bytes
                return

            tosend = min(self.response_length - self.sent, tosend)
            if tosend < arglen:
                arg = arg[:tosend]

        # Sending an empty chunk signals the end of the
        # response and prematurely closes the response
        if self.chunked and tosend == 0:
            return

        self.sent += tosend
        util.write(self.sock, arg, self.chunked)

if self.response_length is not None:
            if self.sent >= self.response_length:
                # Never write more than self.response_length bytes
                return

            tosend = min(self.response_length - self.sent, tosend)
            if tosend < arglen:
                arg = arg[:tosend]

        # Sending an empty chunk signals the end of the
        # response and prematurely closes the response
        if self.chunked and tosend == 0:
            return

        self.sent += tosend
        util.write(self.sock, arg, self.chunked)

if self.response_length is not None:
            if self.sent >= self.response_length:
                # Never write more than self.response_length bytes
                return

            tosend = min(self.response_length - self.sent, tosend)
            if tosend < arglen:
                arg = arg[:tosend]

        # Sending an empty chunk signals the end of the
        # response and prematurely closes the response
        if self.chunked and tosend == 0:
            return

        self.sent += tosend
        util.write(self.sock, arg, self.chunked)